I've written a number of programs in python and Go. I find Go to use about 10% of the CPU that python uses and about 10% of the RAM that python uses.

Not to mention Go is A LOT faster. Python may be quicker to write, but you pay for the overhead over and over again. Biggest issue with Go? Its not easy to do graphics in. Really need a decent plotting library.

I like Julia a lot for data analytics. Go could use a dataframe package as well. But, when doing data analytics in Go, I just do it the old fashioned way by looping through arrays, it is still a lot faster.